Lexus ES manuals

Lexus ES: Terminals Of Ecu

TERMINALS OF ECU

CLEARANCE WARNING ECU ASSEMBLY

(a) Disconnect the N41 clearance warning ECU assembly connector.

(b) Measure the voltage and resistance on the wire harness side connector according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

N41-1 (IG) - N41-30 (E)

B - W-B

IG power source signal

Engine switch off

Below 1 V

Engine switch on (IG)

11 to 14 V

N41-30 (E) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

(c) Reconnect the N41 clearance warning ECU assembly connector.

(d) Measure the voltage and check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

N41-4 (BOF) - N41-30 (E)

R - W-B

Power source for front sensor circuit

Engine switch off

Below 1 V

  • Engine switch on (IG)
  • Parking support alert systemt system on

11 to 14 V

N41-6 (E5) - N41-30 (E)

W - W-B

Ground for front clearance sonar

Always

Below 1 Ω

N41-8 (SOF) - N41-30 (E)

B - W-B

Front sensor communication signal (Front clearance sonar sensor)

  • Engine running
  • Parking support alert systemt system on
  • Shift lever in any position other than P or R
  • Vehicle speed is less than approximately 10 km/h (6 mph)

Pulse generation

(Refer to waveform 1)

N41-14 (CBZ) - N41-13 (EF)

LG - L

No. 1 clearance warning buzzer signal

Buzzer sounding

Pulse generation

(Refer to waveform 2)

N41-15 (BBZ) - N41-16 (ER)

G - BE

No. 2 clearance warning buzzer signal

Buzzer sounding

Pulse generation

(Refer to waveform 2)

N41-22 (BOR) - N41-30 (E)

LG - W-B

Power source for rear sensor circuit

Engine switch off

Below 1 V

  • Engine switch on (IG)
  • Parking support alert systemt system on

11 to 14 V

N41-23 (E1) - N41-30 (E)

GR - W-B

Ground for rear clearance sonar

Always

Below 1 Ω

N41-24 (SOR) - N41-30 (E)

SB - W-B

Rear sensor communication signal (Rear clearance sonar sensor)

  • Engine running
  • Parking support alert systemt system on
  • Shift lever in R
  • Vehicle speed is less than approximately 10 km/h (6 mph)

Pulse generation

(Refer to waveform 1)

N41-28 (STP) - N41-30 (E)*

V - W-B

Reverse signal input

  • Engine running
  • Shift lever in R

11 to 14 V

  • Engine running
  • Shift lever not in R

Below 1 V

N41-31 (IND) - N41-30 (E)*

P - W-B

Display select signal

  • Engine running
  • Shift lever in any position other than P

Below 3 V

  • Engine running
  • Shift lever in P

8 V or higher

  • *: w/o Panoramic View Monitor System

(e) Using an oscilloscope, check waveform 1.

(1) Waveform 1 (Reference)

Item

Content

Measurement terminal

  • CH1: N41-8 (SOF) - N41-30 (E)
  • CH2: N41-24 (SOR) - N41-30 (E)

Measurement setting

5 V/DIV., 1 ms./DIV.

Condition

  • Engine running
  • Parking support alert systemt system on
  • Shift lever in any position other than P or R (CH1)
  • Shift lever in R (CH2)
  • Vehicle speed is less than approximately 10 km/h (6 mph)

HINT:

The waveforms for CH1 and CH2 are same.

(f) Using an oscilloscope, check waveform 2.

(1) Waveform 2 (Reference)

Item

Content

Measurement terminal

N41-14 (CBZ) - N41-13 (EF)

N41-15 (BBZ) - N41-16 (ER)

Measurement setting

2 V/DIV., 500 μs./DIV.

Condition

Buzzer sounding

HINT:

The amplitude of the waveform changes according to the set volume.

BLIND SPOT MONITOR SENSOR RH (w/ Blind Spot Monitor System)

Click here

BLIND SPOT MONITOR SENSOR LH (w/ Blind Spot Monitor System)

Click here

REAR TELEVISION CAMERA ASSEMBLY (w/ Panoramic View Monitor System)

Click here

READ NEXT:

 The Display of the Multi-display does not Switched

DESCRIPTION The multi-display receives a signal from the clearance warning ECU assembly to change the display screen. WIRING DIAGRAM PROCEDURE 1. CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING

 Control Module Communication Bus "A" Off (U0073,U0126,U0129,U0140,U0155)

DESCRIPTION These DTCs are stored when the clearance warning ECU assembly cannot receive and recognize several signals via the CAN communication line. DTC No. Detection Item DTC Detection Condi

 CAN Communication Failure (Message Registry) (U1000)

DESCRIPTION If DTC U1000 is stored frequently, duplicate the conditions that cause the problem symptoms and perform troubleshooting again even if the DTC is not output when rechecking for DTCs. DTC

SEE MORE:

 Motor Resolver Circuit

DESCRIPTION The cause of this malfunction may be the motor resolver. Check the motor resolver internal resistance and the connection condition from the inverter to the resolver. Related Parts Check Area Inspection Wire harness and connector between the inverter and motor resolver Check fo

 Dtc Check / Clear

DTC CHECK / CLEAR CHECK DTC (a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical > Road Sign Assist > Trouble Codes (e) Check for DTCs (Test Failed / Pending / Confirmed). Techstream Display

© 2016-2023 Copyright www.lexguide.net